Residual stress in laser powder bed fusion

Mugwagwa, LYadroitsava, IMakoana, Nkutwane WYadroitsev, IIgor, Yadroitsev, IIna Yadroitsava, IDu Plessis, AMacDonald, E2021-07-192021-07-192021-05Mugwagwa, L., Yadroitsava, I., Makoana, N.W. & Yadroitsev, I. 2021. Residual stress in laser powder bed fusion. In Fundamentals of Laser Powder Bed Fusion of Metals. 1st Edition. Y. Igor, I. Ina Yadroitsava, A. Du Plessis & E. MacDonald, Eds. S.l.: Elsevier. http://hdl.handle.net/10204/12061 .97801282409089780128240915ttps://doi.org/10.1016/B978-0-12-824090-8.00014-7http://hdl.handle.net/10204/12061Laser powder bed fusion (L-PBF) has great prospects for biomedical, automotive, aerospace and other high-tech industry sectors due to its manufacturing flexibility and design freedom. However, several factors that include high residual stresses, random porosity and dimensional accuracy can affect the quality of parts and hamper L-PBF progress and widespread industrial applications. Residual stresses are inherent in laser-based processing, and focused studies to control these stresses are topical. Thermal and mechanical post-processing methods, such as stress-relief heat treatment and machining, can relieve residual stresses but cannot reverse in situ stress-induced distortions or cracking. Thus, in situ stress relief remains an attractive option/complement for managing the effect of residual stress on part strength, surface integrity, and dimensional accuracy. Better still, combining in situ and post-processing stress-relief techniques could be a more effective approach to residual stress control. This chapter presents a detailed analysis of the residual stress control techniques that can be applied in L-PBF. Recommendations for effective evaluation and appropriate selection of residual stress management techniques are outlined.FulltextenAdditive manufacturingLaser powder bed fusionResidual stressDistortionsIn situ controlPost processingResidual stress in laser powder bed fusionBook ChapterMugwagwa, L., Yadroitsava, I., Makoana, N. W., & Yadroitsev, I. (2021). Residual stress in laser powder bed fusion. In Y. Igor, I. Ina Yadroitsava, A. Du Plessis & E. MacDonald. (Eds.), Fundamentals of Laser Powder Bed Fusion of Metals. 1st Edition Elsevier. http://hdl.handle.net/10204/12061Mugwagwa, L, I Yadroitsava, Nkutwane W Makoana, and I Yadroitsev. "Residual stress in laser powder bed fusion" In FUNDAMENTALS OF LASER POWDER BED FUSION OF METALS. 1ST EDITION, edited by Yadroitsev Igor. n.p.: Elsevier. 2021. http://hdl.handle.net/10204/12061.Mugwagwa L, Yadroitsava I, Makoana NW, Yadroitsev I. Residual stress in laser powder bed fusion. In Igor Y, Ina Yadroitsava I, Du Plessis A, MacDonald E, editors.. Fundamentals of Laser Powder Bed Fusion of Metals. 1st Edition. [place unknown]: Elsevier; 2021. [cited yyyy month dd]. http://hdl.handle.net/10204/12061.TY - Book Chapter AU - Mugwagwa, L AU - Yadroitsava, I AU - Makoana, Nkutwane W AU - Yadroitsev, I AB - Laser powder bed fusion (L-PBF) has great prospects for biomedical, automotive, aerospace and other high-tech industry sectors due to its manufacturing flexibility and design freedom. However, several factors that include high residual stresses, random porosity and dimensional accuracy can affect the quality of parts and hamper L-PBF progress and widespread industrial applications. Residual stresses are inherent in laser-based processing, and focused studies to control these stresses are topical. Thermal and mechanical post-processing methods, such as stress-relief heat treatment and machining, can relieve residual stresses but cannot reverse in situ stress-induced distortions or cracking. Thus, in situ stress relief remains an attractive option/complement for managing the effect of residual stress on part strength, surface integrity, and dimensional accuracy. Better still, combining in situ and post-processing stress-relief techniques could be a more effective approach to residual stress control. This chapter presents a detailed analysis of the residual stress control techniques that can be applied in L-PBF. Recommendations for effective evaluation and appropriate selection of residual stress management techniques are outlined. DA - 2021-05 DB - ResearchSpace DP - CSIR ED - Igor, Yadroitsev, I ED - Ina Yadroitsava, I ED - Du Plessis, A ED - MacDonald, E J1 - Fundamentals of Laser Powder Bed Fusion of Metals. 1st Edition KW - Additive manufacturing KW - Laser powder bed fusion KW - Residual stress KW - Distortions KW - In situ control KW - Post processing LK - https://researchspace.csir.co.za PY - 2021 SM - 9780128240908 SM - 9780128240915 T1 - Residual stress in laser powder bed fusion TI - Residual stress in laser powder bed fusion UR - http://hdl.handle.net/10204/12061 ER -24839